Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc712759a466dda…

MALICIOUS

PDF

41.7 KB Created: 2020-08-26 14:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ca68378e07d269b61c4bbe76f580d05 SHA-1: 2a55be8af4b480fe60d1df2dde86ee839d2bb89f SHA-256: 8fc712759a466dda9d119bbe020fea6886a3bbee44c66358d8412ad4879c6e90
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with at least one identified as a malicious redirector. The heuristic firings indicate this is likely a link farm or SEO poisoning attempt, designed to lure users to malicious sites. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=how+many+pets+can+you+have+in+prodig
    • http://files.kennelfanchon.com/uploads/1/3/1/4/131437937/kuwojix_kutibumalitoka.pdf
    • http://vezitija.pitstopphotos.com/uploads/1/3/0/7/130739192/2733e777e6ac.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/78156104778.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/72932161751.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/67576718934.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/messenger_app_for_mobile_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/mawawavapesa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3294/3519/files/anomalias_de_cordon_umbilical.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/batiratafudirusewugudujox.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/weight_watchers_points_list_2018.pdf
    • https://cdn.shopify.com/s/files/1/0437/1624/7703/files/94000653012.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000585d.bin
f9a8cb88b12aed93969bb248db8ea0815834c4ba2433592e133271e3ca7abcb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x585D 5672 bytes
font_01_sfnt_off00006b8b.bin
efd426ce251d8403cfc59a2c2bef70254fd969969ab71d39f9868f5ec59c2800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8B 15068 bytes

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